61056000605 has 4 divisors (see below), whose sum is σ = 73267200732. Its totient is φ = 48844800480.

The previous prime is 61056000569. The next prime is 61056000647. The reversal of 61056000605 is 50600065016.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23415732484 + 37640268121 = 153022^2 + 194011^2 .

It is not a de Polignac number, because 61056000605 - 2¹² = 61055996509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6105600056 + ... + 6105600065.

It is an arithmetic number, because the mean of its divisors is an integer number (18316800183).

Almost surely, 2^61056000605 is an apocalyptic number.

It is an amenable number.

61056000605 is a deficient number, since it is larger than the sum of its proper divisors (12211200127).

61056000605 is a wasteful number, since it uses less digits than its factorization.

61056000605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12211200126.

The product of its (nonzero) digits is 5400, while the sum is 29.

The spelling of 61056000605 in words is "sixty-one billion, fifty-six million, six hundred five", and thus it is an aban number.